Good morning everyone.
Hi, Edwin. The part is already sold, unfortunately. As a note of assistance, however, if your rear wiper is the only item not working, I'd recommend checking the rear door plunger switch and it's associated wiring behind the rear speaker trim. I had a similar problem and that was what it ended up being.
The MF ECU logic module requires the plunger switch to indicate the door is closed in order for the wiper to work, and if the plunger switch isn't working properly or is shorting, no rear wiper.
Even if I can't help you with the module, hopefuly this will.